So what is Dark Data?

Dark data is a type of unstructured, untagged and untapped data that is found in data repositories and has not been analyzed or processed. It is similar to big data but differs in how it is mostly neglected by business and IT administrators in terms of its value.
-- Techopedia

Dark data is the cute name given to all that data an organization gathers that is not part of their day to day operations.
--Isaac Sacolick blog

Dark data is stuff we know we have, but don’t know what to do with.--Fred Pulzello

When we hear about “Dark Data” most of us think about dusty old records, a dark file room, or those boxes that nobody is certain what to do with. But what about those old files on your share drive or old emails in your archives folder? This reluctance to dispose incurs significant increases in discovery costs and potential risk of spoliation of obsolete media. In this webinar, we will identify the issues, requirements, and risks associated with over retained electronic records.